Large files open with a blank preview in the Codex app

What version of the Codex App are you using (From “About Codex” dialog)?

26.623.141536

What subscription do you have?

Enterprise

What platform is your computer?

Darwin 25.5.0 arm64 arm

What issue are you seeing?

Opening a large source file in the Codex desktop app can show a completely blank preview instead of its contents. In the visual-builder workspace, clicking visual-runtime.js (a generated runtime bundle, 1,013,662 bytes / about 990 KB) results in a blank preview. No visible error or size-limit explanation is shown.

What steps can reproduce the bug?

1. Open a workspace containing a large source file.
2. Click the file in Codex to preview it.
3. Observe the preview pane.

Example: visual-runtime.js in the visual-builder workspace.

What is the expected behavior?

Render the file content, or provide a clear size-limit message and an alternative way to view the file.

Additional information

Impact: large generated or bundled files are difficult to inspect in the Codex app. A screenshot and additional environment details can be provided if helpful.